A.a probability function
B.a random variable
C.thee xpected value
D.random function
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A.0.4332
B.0.9332
C.0.0668
D.0.5668
A.1.1022
B.2
C.30
D.1.4847
A.12.5
B.8
C.0.64
D.1.25
最新試題
為什么在計算平均指標(biāo)的基礎(chǔ)上還有必要進一步計算變異指標(biāo)?
A cumulative frequency polygon is also called ().
常用的長期趨勢測定的方法有哪些?各有什么特點?
Which of the following is not the goal of descriptive statistics?()
Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). The average number of absences per employee, calculated from the personnel data of all employees, is a ().
Which of the following statements is not true?()
某班的學(xué)習(xí)按考試成績分為60分以下,60-70,70-80,80-90,90-100,這種分組()
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個車間,這四個車間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少?
在組距數(shù)列中,下限就是()
對某班級學(xué)生的生活狀況進行統(tǒng)計調(diào)查,下列標(biāo)志中屬于不變標(biāo)志的是()